Bracket lock washer causing rubbing?

Lynxmotion Servo Erector Set
1

Hello,

When connecting the standard size C brackets on the multipurpose bracket, from the assembly guide step 7 of lynxmotion.com/images/html/build118.htm says i need to add a lock washer.

So this is the order in which i put them together : Machine Screw into the bearing, then the bearing and machine screw fit into the outside hole of the C bracket, on the inside of the C bracket i place a lock washer onto the shaft of the machine screw, the shaft of the screw is then sent through the outer multi-purpose bracket hole, on the inside of the multi-purpose bracket i screw on a nut onto the shaft.

However, this causes the multi-purpose bracket to rub onto the C bracket when the horn of the servo is moving after (servo) being attached to the C bracket’s other hole.

Did I get the assembly of the nuts and bolts correct for the C bracket and Multi-purpose bracket ?

Should i just use a normal washer instead ?

Or would this rubbing just wear off after a while ?

2

Just to confirm first - do you have a normal SES arm kit such as an AL5 arm? If so it’s best to follow that procedure.
If you’re creating your own project based on SES parts, we hope the following explanation helps:

When you mount the servo, and connect the horn to the opposite side of the C-bracket, it should move the C bracket away from the multipurpose bracket so they do not rub.
If you still see there is rubbing, can you provide an image of the setup so we can see all of the parts?